:root {
    --fraction-main-color: #59453c; 
    --fraction-title-color: #4a3b33; 
    --fraction-bg-box: #fbf9f7;    
    /* --fraction-filled-bg: #7da18e; */
    --fraction-filled-bg: #86a393;
    --fraction-filled-text: #ffffff; 
    --fraction-empty-bg: #faf8f7;   
    --pattern-bg-light: #fdf3eb;
    --pattern-bg-dark: #f7decb;
    --pattern-bg-grid: #fbf7f4;
    --pattern-line-grid: #edd3c4;
}

.steps {
    margin-top: 0px !important;
    border-top: unset !important;
    padding-top: 0px !important;
}

.visualizer-container {
    width: 100%;
    font-family: system-ui, -apple-system, sans-serif;
    color: var(--fraction-main-color);
    margin-top: 20px;
}

.visualizer-section {
    margin-bottom: 30px;
}

.visualizer-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--fraction-title-color);
}

.mathjax-explanation-box {
    background-color: var(--fraction-bg-box);
    border-left: 4px solid var(--fraction-filled-bg);
    padding: 15px;
    border-radius: 4px;
    margin-bottom: 25px;
    display: flex;
    flex-direction: column;
    align-items: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.02);
}

.mathjax-intro-text {
    font-size: 15px;
    color: var(--fraction-main-color);
    opacity: 0.8;
    font-weight: 500;
    margin-bottom: 5px;
    align-self: flex-start;
}

.mathjax-formula {
    font-size: 24px;
    color: var(--fraction-title-color);
    margin: 10px 0;
}

.blocks-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.whole-block-wrapper {
    flex: 1;
    min-width: 130px;
    max-width: 200px;
}

.block-unit {
    height: 54px;
    border: 2px solid var(--fraction-main-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 4px rgba(89, 69, 60, 0.08);
}

.block-label {
    background: rgba(255, 255, 255, 0.92);
    padding: 3px 10px;
    border-radius: 5px;
    font-size: 13px;
    font-weight: 700;
    color: var(--fraction-main-color);
    border: 1px solid #e1dcd9;
}

.pattern-stripes {
    background: repeating-linear-gradient(45deg, var(--pattern-bg-light), var(--pattern-bg-light) 8px, var(--pattern-bg-dark) 8px, var(--pattern-bg-dark) 16px);
}

.pattern-dots {
    background: radial-gradient(var(--pattern-bg-dark) 20%, transparent 20%) 0 0, radial-gradient(var(--pattern-bg-dark) 20%, transparent 20%) 6px 6px;
    background-color: var(--pattern-bg-light);
    background-size: 12px 12px;
}

.pattern-squares {
    background-image: linear-gradient(var(--pattern-line-grid) 1px, transparent 1px), linear-gradient(90deg, var(--pattern-line-grid) 1px, transparent 1px);
    background-size: 10px 10px;
    background-color: var(--pattern-bg-grid);
}

.pattern-waves {
    background: linear-gradient(135deg, var(--pattern-bg-dark) 25%, transparent 25%) -8px 0, linear-gradient(225deg, var(--pattern-bg-dark) 25%, transparent 25%) -8px 0;
    background-color: var(--pattern-bg-light);
    background-size: 16px 16px;
}

.pattern-diagonal {
    background: repeating-linear-gradient(-45deg, var(--pattern-bg-dark), var(--pattern-bg-dark) 4px, var(--pattern-bg-light) 4px, var(--pattern-bg-light) 12px);
}

.fraction-block-wrapper {
    width: 100%;
    max-width: 650px;
}

.fraction-block-row {
    display: flex;
    width: 100%;
    height: 54px;
    border: 2px solid var(--fraction-main-color);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(89, 69, 60, 0.08);
    background-color: #fff;
}

.block-part {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    border-right: 1px solid var(--fraction-main-color);
    box-sizing: border-box;
    flex-grow: 0;
    flex-shrink: 0;
}

    .block-part:last-child {
        border-right: none;
    }

    .block-part .part-text {
        font-size: 11px;
        font-weight: 700;
        white-space: nowrap;
        letter-spacing: -0.03em; 
        padding: 0 2px;
        overflow: hidden;
        text-overflow: clip;
    }

.part-filled {
    background-color: var(--fraction-filled-bg);
    color: var(--fraction-filled-text);
    text-shadow: 0 1px 1px rgba(0,0,0,0.1);
}

.part-empty {
    background-color: var(--fraction-empty-bg);
}

.fraction-explanation {
    margin-top: 8px;
    font-size: 13px;
    color: var(--fraction-main-color);
    opacity: 0.8;
    font-style: italic;
}

@media (max-width: 500px) {
    .fraction-block-row .block-part .part-text {
        display: none; 
    }

    .fraction-block-row {
        height: 42px;
    }

    .whole-block-wrapper {
        min-width: 90px;
    }

    .block-unit {
        height: 45px;
    }

    .block-label {
        font-size: 11px;
        padding: 2px 6px;
    }
}